Is there any way to align this circle?
You can do something like this:
click on the edge you to to align, in order so 3d cursor will be there-->add a plane and scale it a bit--> select the object you want to move--> enable snap during transform (small magnet icon) and select snap to face--> press G to grab and X,Y ou Z to move on that axis. Once it is close to the plane, will snap onto it. press enter, deactivate the magnet and delect the plane